Vampire Depths

this deck started out as a weenie deck based around vampire hexmage and dark depths. if i didnt get the hexmage dark depths combo out quickly, i could beatdown with the cheap, fast vampires instead. after playing with it a few times, i decided i needed some bigger stuff, so i put in the nocturnus, revenant, mephidross, butcher and the planeswalkers. i also threw in a cryptic gateway to help get in the expensive creatures. the elixirs are for cheap life gain and deck recycling for extended games. i havent played magic in a while, and was inspired to make a vampire deck after seeing some of the new ones. when i played before, i wasnt that great of a deck builder either, so im definitely open to any suggestions for the deck. i always build casual decks, so just about any suggestions are fine. ive considered adding some dusk urchins to get some draw because the deck really slows down once your hand is empty. i also plan on adding some blood tribute and sanguine bond, so any suggestions on how to mix in those three cards would be appreciated.